TABLE 1.
Baseline characteristics of the participants1
| Treatment arm |
||
| Vitamin D (n = 61) | Placebo (n = 59) | |
| Age (y) | 13.0 ± 1.12 | 13.1 ± 1.5 |
| Male (%) | 45.9 | 52.5 |
| Type of residence (%) | ||
| Yurt | 50.8 | 49.2 |
| 1- or 2-bedroom apartment | 1.6 | 1.7 |
| House without central heating | 47.5 | 49.2 |
| Weight (kg) | 42.8 ± 7.8 | 44.8 ± 9.5 |
| Height (cm) | 151.6 ± 8.1 | 152.4 ± 8.8 |
| BMI (kg/m2) | 18.5 ± 2.1 | 19.1 ± 2.5 |
| Midupper arm circumference (cm) | 23.2 ± 2.5 | 23.6 ± 3.0 |
| Triceps skinfold thickness | 11.7 ± 4.9 | 12.3 ± 5.1 |
| Subscapular skinfold thickness | 10.0 ± 4.3 | 10.2 ± 4.6 |
| Serum 25(OH)D | 7.0 ± 3.6 | 7.3 ± 3.9 |
| TST positive (n) | 16 | 18 |
| TST negative (n) | 45 | 41 |
| T-SPOT.TB3 positive (n) | 9 | 5 |
| T-SPOT.TB3 negative (n) | 7 | 12 |
1
None of the variables were significantly different at baseline. TST, tuberculin skin test; 25(OH)D, 25-hydroxyvitamin D.
2
Mean ± SD (all such values).
3
Oxford Immunotec.